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곱셈: 2 x 21X9

1

		1	9
		4	7
	1	3	3
	7	6	0
	8	9	3

2

		2	4
		4	8
	1	9	2
	9	6	0
1	1	5	2

3

		4	5
		9	5
	2	2	5
4	0	5	0
4	2	7	5

4

		1	8
		1	1
		1	8
	1	8	0
	1	9	8

5

		1	2
		2	4
		4	8
	2	4	0
	2	8	8

6

		1	3
		7	6
		7	8
	9	1	0
	9	8	8

7

		6	4
		1	0
			0
	6	4	0
	6	4	0

8

		6	0
		3	3
	1	8	0
1	8	0	0
1	9	8	0

9

		1	4
		5	3
		4	2
	7	0	0
	7	4	2

10

		6	2
		5	2
	1	2	4
3	1	0	0
3	2	2	4

11

		3	2
		5	6
	1	9	2
1	6	0	0
1	7	9	2

12

		7	5
		9	2
	1	5	0
6	7	5	0
6	9	0	0

13

		5	2
		4	6
	3	1	2
2	0	8	0
2	3	9	2

14

		1	0
		6	2
		2	0
	6	0	0
	6	2	0

15

		1	6
		7	4
		6	4
1	1	2	0
1	1	8	4

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